Review of Analytical Work Done Abroad in 1905.

Abstract

IOO cc. of solution 0.603 gram of the salt. This value falls on the curve given in the plate. ' I We see then that in solubility the permanganates bear a general resemblance to the chlorplatinates in that those of most of the heavy metals are very soluble, while those of the alkali metals, and particularly of caesium dissolve in water with difficulty. The saturated solution of the latter a t oo is light violet in color, and even permits one to detect the presence in it of free acid with litmus paper. At the same temperature strontium permanganate is about 2,700 times, and calcium permanganate nearly 3,000 times, as soluble." The specific gravity of the saturated solution of potassium permanganate a t 15' is 1.035; hence, according to the writer's determination above, IOO parts of water dissolve 5.31 grams a t this temperature. This value confirms the accuracy of Baxter, Boylston and Hubbard's curve and shows that the widely recorded value of Mitscherlich is considerably too high. AUSTIX M. PATTERSON.